Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01df783e89e18c8…

MALICIOUS

PDF

44.2 KB Created: 2020-08-14 10:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15ac34d25f16a061db47e202114e3ae4 SHA-1: 3cfc94723f6dcc99cccd641b73cc6a895cedc064 SHA-256: f01df783e89e18c816de9863ad2e99aacd782acc42aa89dd534916074c3edce3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text and URLs that align with a lure for malicious content. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content broadly.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=leadership%20qualities%20articles%20pdf
    • http://files.hillcresthuntingclubincllc.com/uploads/1/3/1/4/131412181/fimowik_berokewo_futil.pdf
    • http://mozefo.bmbmstevens.com/uploads/1/3/1/6/131636755/71c18.pdf
    • http://ruwofofi.mertoncatholics.org.uk/uploads/1/3/1/8/131856570/sisolofazet_jegiti_lunamazojejewa_panakatasusaxid.pdf
    • http://files.artistsofkerrisdale.com/uploads/1/3/1/3/131383429/nadomamul.pdf
    • http://rasiruma.ibewlocal176.org/uploads/1/3/1/4/131409508/8072839.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5974/files/42012724430.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wofizafadunemewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2630/8510/files/jakixemafejinezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1967/files/91572122332.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/saxujo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/rovavuleba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/vubadumudo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/52720717722.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/99759826878.pdf
    • https://cdn.shopify.com/s/files/1/0434/6019/8557/files/38209737122.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006111.bin
e23ff8d646f8e57551f0211cd538536c17107402af8deeb6ebf1df524da292ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6111 4976 bytes
font_01_sfnt_off00007210.bin
8d745da7b7733a9dfeae50090c7e3838c4b650395b878c9579965a2e83d0b908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7210 10764 bytes
font_02_sfnt_off00009601.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9601 4324 bytes

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